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Euclid NISP thermal control design
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Paper Abstract

In this paper we describe the thermal architecture of the Near Infrared Spectro-Photometer (NISP) on board the Euclid ESA mission. The instrument thermal design is based on the combination of two passive radiators coupled to cold space that, exploiting the beneficial conditions of the L2 thermal environment, provide the temperature references for the main sub-systems. One radiator serves as a 135K heat sink for the opto-mechanical structure and for the front-end cold electronics, while working as an interception stage for the conductive parasitic heat leaks through struts and harness. The second, colder, radiator provides a 95K reference for the instrument detectors. The thermal configuration has to ensure the units optimal operating temperature needed to maximize instrument performance, adopting solutions consistent with the mechanical specifications. At the same time the design has to be compliant with the stringent requirements on thermal stability of the optical and detector units. The periodical perturbation of filter and grism wheel mechanisms together with orbital variations and active loads instabilities make the temperature control one of the most critical issues of the whole design. We report here the general thermal architecture at the end of the Definition Phase, together with the first analysis results and preliminary performance predictions in terms of steady state and transient behavior. This paper is presented on behalf of the Euclid Consortium.

Paper Details

Date Published: 21 September 2012
PDF: 12 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 844234 (21 September 2012); doi: 10.1117/12.925553
Show Author Affiliations
G. Morgante, INAF - IASF Bologna (Italy)
T. Maciaszek, Ctr. National d'Etudes Spatiales (France)
L. Martin, Lab. d'Astrophysique de Marseille (France)
M. Riva, INAF - Osservatorio Astronomico di Brera (Italy)
F. Bortoletto, INAF - Osservatorio Astronomico di Padova (Italy)
E. Prieto, Lab. d'Astrophysique de Marseille (France)
C. Bonoli, INAF - Osservatorio Astronomico di Padova (Italy)
L. Corcione, INAF - Osservatorio Astronomico di Torino (Italy)
V. De Caprio, INAF - IASF Milano (Italy)
F. Grupp, Max-Planck-Institut für extraterrestrische Physik (Germany)
S. Ligori, INAF - Osservatorio Astronomico di Torino (Italy)
M. Trifoglio, INAF - IASF Bologna (Italy)
L. Valenziano, INAF - IASF Bologna (Italy)
F. M. Zerbi, INAF - Osservatorio Astronomico di Brera (Italy)

Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann Jr., Editor(s)

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